package org.example.serviceEdu.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import org.example.exceptionHandler.GuliException;
import org.example.serviceEdu.entity.EduSubject;
import org.example.serviceEdu.entity.excel.SubjectData;
import org.example.serviceEdu.service.EduSubjectService;

import java.util.Map;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {
    public EduSubjectService subjectService;
    public SubjectExcelListener(){}
    public SubjectExcelListener(EduSubjectService subjectService){
        this.subjectService=subjectService;
    }
//    一行一行的读出来

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if (subjectData == null) {
            throw new GuliException(20001, "文件数据为空");}
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if (existOneSubject == null) { //一级分类没有重复,进行添加
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }
        //②添加二级分类
        //先获得一级分类的id
        String pid = existOneSubject.getId();
        //再添加二级分类
        EduSubject existTwoSubject = this.existTwoSubject(subjectService,subjectData.getTwoSubjectName(), pid);
        if (existTwoSubject == null) { //二级分类没有重复,进行添加
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }

    }

    private EduSubject existOneSubject(EduSubjectService subjectService, String name) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", "0");
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }

    //判断二级分类是否重复
    private EduSubject existTwoSubject(EduSubjectService subjectService, String name, String pid) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", pid);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }

//读取之后的方法
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
